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1995 Fiscal Year Final Research Report Summary

Specificity of light-harvesting systems of chromophytes in reference to their energy migration

Research Project

Project/Area Number 06640839
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 植物生理
Research InstitutionKYOTO UNIVERSITY

Principal Investigator

KATOH Tetsuya  Kyoto Univ., Fac.Sci., Ass.Prof., 理学研究科, 助教授 (30025308)

Co-Investigator(Kenkyū-buntansha) TANAKA Ayumi  Kyoto Univ., Fac.Sci., Lecturer, 理学研究科, 講師 (10197402)
Project Period (FY) 1994 – 1995
Keywordscarotenoid / fucoxanthin / excitation energy migration / light harvesting / fucoxanthin-chlorophyll protein / brown algae / chromophyte
Research Abstract

To understand why, among a vrieties of carotenoid species, fucoxanthin is used for the light-harvesting in chromophyte algae, an attempt was made to replace the fucoxanthin molecules in fucoxanthin-chlorophyll a/c protein with different species of carotenoids and to analyze their excitation energy transfer to chlorophyll a. Treatment of purified and lyophyrized fucoxanthin-chlorophyll a/c protein from Ectocarpus (pheophyte) with anhydrous diethylether, a fucoxanthin-depleted protein preparation was obtained, in which three of 4 fucoxanthins originally bound were removed. This protein retained 2 chlorophyll a's but the excitation energy migration both between fucoxanthin and chlorophyll a between chlorophyll c and chlorophyll a were hardly seen in this protein. When this fucoxanthin-depleted protein was incubated with fucoxanthin in 0.1% lauryl sucrose, fucoxanthin was incoporated into protein in the form competent in excitation energy migration to chlorophyll a, and simultaneously regained in the energetic coupling from chlorophyll c to a. beta-Carotene and zeaxanthin were also incorporated into this protein but without showing any recovery of these energetic coupling, while neither 19'-hexanoyl oxyfucoxanthin isolated from Ruttnera (haptophyte) nor peridinin isolated from Symbionidium (dinophyte) was incorporated in this protein, indicating the fucoxanthin-binding domain of this protein is not highly specific to fucoxanthin but is not structurally fitted to modifid forms of carotenoids.

  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] Osuka,A.: "Fucoxanthin-pyropheophorbide and zeaxanthin-pyropheophorbide dyads as new models for study on carotenoid-chlorophyll excited state interaction" Bull.Chem.Soc.Jpn.68. 3255-3268 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Ohno,T.: "The origin of algal-bivalve photo-symbiosis" Paleontology. 38. 1-21 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Ogata,T.: "A novel peridnin-chlorophyll a protein (PCP) feom the marine dinoflagellate,Alexandrium cohorticula : a high pigment content and plural spectral froms of peridinin and chlorophyll a." FEBS Letters. 356. 367-371 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Tanaka,A.: "Preferential accumulation of apoproteins of the light harvesting chlorophyll a/b protein complex in grcening barley leaves treated with 5-aminolevulinic acid." Planta. 192. 92-97 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Ito,H.: "Conversion of chlorophyll b to chlorophyll a by isolated cucumber etioplasts." Arch.Biochem.Biophys.306. 148-151 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Yun,J.-G.: "Acute morphogical changes of palisade cells of Saintpaulia leaves induced by temperature drop" J.Plant Research. 106(in press). (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Osuka, A., Shinoda, S., Marumo, S., Yamada, H., Katoh, T., Yamazaki, I., Nishimura, Y., Tanaka, Y., Taniguchi, S., Okada, T., Nozaki, K.& Ohno, T.: "Fucoxanthin-pyropheophorbide and zeaxanthin-pyropheophorbide dyads as new models for study on carotenoid-chlorophyll excited state interaction" Bull.Chem.Soc.Jpn.68. 3255-3268 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Ohno, T., Katoh, T.& Yamasu, T.: "The origin of algal-bivalve photo-symbiosis" Paleontology. 38. 1-21 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Ogata, T., Kodama, M., Nomura, S., Kobayashi., Nozawa, T., Katoh, T & Mimuro, M.: "A novel peridnin-chlorophyll a protein (PCP) from the marine dinoflagellate, Alexandrium cohorticula : a high pigment content and plural spectral forms of peridinin and chlorophyll a." FEBS Letters. 356. 367-371 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Tanaka, A.Tanaka, Y.and Tsuji, H.: "Preferential accumulation of apoproteins of the light harvesting chlorophyll a/b protein complex in greening barley leaves treated with 5-aminolevulinic acid." Planta. 192. 92-97 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Ito, H.and Tanaka, A.: "Conversion of chlorophyll b to chlorophyll a by isolated cucumber etioplasts." Arch.Biochem.Biophys.306. 148-151 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Yun, J.-G., Hayashi, T., Yazawa, S., Katoh, T.& Yasuda, Y.: "Acute morphogical changes of palisade cells of Saintpaulia leaves induced by temperature drop" J.Plant Research. 106 in press. (1996)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1999-03-09  

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